mohit: I guess showing object chooser after back switching to the activity is just by accident, the core issue that SliderPuzzle passes None for parent argument (it needs to pass activity window object)

mukesh_dce: it should not relate to the manifest file (it is being used only to list files that will go to .xo file), to get access to any file from your actiivty directory, try to use sugar.activity.activity.get_bundle_path()